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SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS April 2009 No. OCH460 TECHNICAL & SERVICE MANUAL R410A R22 Indoor unit [Model names] [Service Ref.] PKFY-P12NHMU-E PKFY-P15NHMU-E PKFY-P18NHMU-E PKFY-P12NHMU-E PKFY-P15NHMU-E PKFY-P18NHMU-E Note: • This manual describes only service data of the indoor units. • RoHS compliant products have mark on the spec name plate. CONTENTS INDOOR UNIT 1. PART NAMES AND FUNCTIONS .......... 2 2. SPECIFICATION ..................................... 4 3. OUTLINES AND DIMENSIONS .............. 6 4. WIRING DIAGRAM ................................. 7 5. REFRIGERANT SYSTEM DIAGRAM.......... 8 6. MICROPROCESSOR CONTROL ........... 9 7. TROUBLESHOOTING .......................... 14 8. DISASSEMBLY PROCEDURE ............. 21 PARTS CATALOG (OCB460) 1 PART NAMES AND FUNCTIONS Filter Indoor unit Louver Air intake Vane Air outlet Wireless remote controller CHECK TEST RUN display CHECK and TEST RUN display indicate that the unit is being checked or test-run. MODEL SELECT display display Lights up while the signal is transmitted to the indoor unit when the button is pressed. display Blinks when model is selected. SET TEMP. display indicates the set desired temperature. CLOCK display display Displays the current time. OPERATION MODE display Operation mode display indicates which operation mode is in effect. TIMER display CHECK TEST RUN MODEL SELECT °F °C AMPM Displays when in timer operation or when setting timer. “ AMPM NOT AVAILABLE display The vertical direction of air flow is indicated. ON/OFF “ TEMP ”“ ” display Displays the order of timer operation. ”“ ” display Displays whether timer is on or off. display button FAN SPEED display indicates which fan speed has been selected. FAN AUTO STOP VANE AUTO START SET TEMPERATURE button sets any desired room temperature. ON/OFF button The unit is turned ON and OFF alternately each time the button is pressed. MODE TIMER CONTROL buttons CHECK LOUVER h FAN SPEED SELECT button Used to change the fan speed. MODE SELECT button TEST RUN SET min RESET AUTO STOP (OFF timer): when this switch is set, the air conditioner will be automatically stopped at the preset time. AUTO START (ON timer): when this switch is set, the air conditioner will be automatically started at the preset time. CLOCK Used to switch the operation mode between cooling, drying, fan, heating and auto mode. h and min buttons Buttons used to set the “hour and minute” of the current time and timer settings. + In case the outdoor unit is cool only type, the heating and auto mode are not available. LOUVER button Changes left/right airflow direction. CHECK-TEST RUN button (Not available for this model.) Only press this button to perform an inspection check or test operation. Do not use it for normal operation. CLOCK button RESET button VANE CONTROL button SET button Used to change the air flow 2 Wired remote controller Display Section For purposes of this explanation, all parts of the display are shown as lit. During actual operation, only the relevant items will be lit. Day-of-Week “Sensor” indication Shows the current day of the week. Displayed when the remote controller sensor is used. Time/Timer Display Shows the current time, unless the simple or Auto Off timer is set. If the simple or Auto Off timer is set, the time to be switched off is shown. “Locked” indicator Indicates that remote controller buttons have been locked. Identifies the current operation “Clean The Filter” indicator Shows the operating mode, etc. *Multilanguage display is available. To be displayed on when it is time to clean the filter. TIME SUN MON TUE WED THU FRI SAT TIMER Hr ON AFTER Indicates that operation from the remote controller has been prohibited by a master controller. FUNCTION FILTER °F°C °F°C “Centrally Controlled” indicator Timer indicators AFTER OFF ERROR CODE The indicator comes on if the corresponding timer is set. WEEKLY SIMPLE AUTO OFF ONLY1Hr. Fan Speed indicator Shows the selected fan speed. “Timer is Off” indicator Indicates that the timer is off. Up/Down Air Direction indicator The indicator shows the direction of the outcoming airflow. Room Temperature display Shows the room temperature. The room temperature display range is 46–102°F. The display blinks if the temperature is less than 46°F or 102°F or more. Ventilation indicator Appears when the unit is running in Ventilation mode. “One Hour Only” indicator Temperature Setting Shows the target temperature. Displayed if the airflow is set to Low or downward during COOL or DRY mode. (Operation varies according to model.) The indicator goes off in one hour, at which time the airflow direction also changes. Louver display Indicates the action of the swing louver. Does not appear if the louver is not running. (Power On indicator) Indicates that the power is on. Operation Section ON/OFF button Temperature setting buttons Down Fan Speed button Up Timer Menu button (Monitor/Set button) Filter button ( button) Mode button (Return button) TEMP. ON/OFF Set Time buttons Check button (Clear button) Back Ahead Timer On/Off button (Set Day button) Test Run button MENU BACK PAR-21MAA MONITOR/SET ON/OFF FILTER DAY CLOCK CHECK TEST OPERATION Airflow Up/Down button CLEAR Louver button ( Operation button) To return operation number Opening the lid Built-in temperature sensor Ventilation button ( Operation button) To go to next operation number Note: ● “PLEASE WAIT” message This message is displayed for approximately 3 minutes when power is supplied to the indoor unit or when the unit is recovering from a power failure. ● “NOT AVAILABLE” message This message is displayed if an invalid button is pressed (to operate a function that the indoor unit does not have). If a single remote controller is used to operate multiple indoor units simultaneously that are different types, this message will not be displayed as far as any of the indoor units is equipped with the function. 3 2 SPECIFICATION 2-1. Specifications PKFY-P12NHMU-E Service Ref. PKFY-P15NHMU-E 1-phase 208-230V 60Hz Power source Cooling capacity (Nominal) *1 *1 Power input Current input Heating capacity (Nominal ) *2 *2 Power input Current input External finish External dimension H × W × D Net weight Heat exchanger Fan kW Btu/h kW A kW Btu/h kW A 4.4 15,000 0.03 0.30 5.0 17,000 0.03 0.30 3.5 12,000 0.03 0.30 4.0 13,500 0.03 0.30 Line flow fan × 1 0 0 DC motor Type × Quantity static press. Pa mmH2O Motor type Motor output kW 0.030 Direct-drive Driving mechanism Airflow rate (Low-Mid-High) m3/min L/s cfm dB 9 - 10 - 11 150 - 167 - 183 320 - 355 - 390 Noise level (Low-Mid-High) (measured in anechoic room) Insulation material Air filter Protection device Refrigerant control device Connectable outdoor unit Diameter of (R410A) mm (in.) Liquid refrigerant pipe (R22) Gas 34 - 38 - 42 ø6.35 (ø1/4") ø6.35 (ø1/4") ø12.7 (ø1/2") ø12.7 (ø1/2") Field drain pipe size Standard Document attachment Accessory External heater adapter Remarks Installation Indoor : Outdoor : Pipe length : Level difference : *1 Nominal cooling conditions 9 - 10.5 - 11.5 150 - 175 - 192 320 - 370 - 405 9 - 10.5 - 12 150 - 175 - 200 320 - 370 - 425 34 - 38 - 42 36 - 41 - 45 Polyethylene sheet PP honeycomb Fuse LEV R410A, R22 CITY MULTI (R410A) mm (in.) (R22) mm (in.) Optional parts 5.3 18,000 0.03 0.30 5.9 20,000 0.03 0.30 Plastic, MUNSELL (1.0Y 9.2/0.2) 295 × 898 × 249 11-5/8" × 35-3/8" × 9-13/16" 13 (29) Cross fin (Aluminum fin and copper tube) mm in. kg (lb) External Note : PKFY-P18NHMU-E Flare Flare Flare Flare ø6.35 (ø1/4") Flare ø6.35 (ø1/4") Flare ø12.7 (ø1/2") Flare ø12.7 (ø1/2") Flare I.D. 16mm (5/8") Installation Manual, Instruction Book — — ø6.35 (ø1/4") ø9.52 (ø3/8") ø12.7 (ø1/2") ø15.88 (ø5/8") Flare Flare *3 Flare Flare *3 — PAC-YU25HT Details on foundation work, insulation work, electrical wiring, power source switch, and other items shall be referred to the Installation Manual. *2 Nominal heating conditions 80°FDB/67°FWB (26.7°CDB/19.4°CWB) 95°FDB (35°CDB) 25 ft. (7.6 m) 0 ft (0 m) 70°FDB(21°CDB) 47°FDB/43°FWB (8.3°CDB/6.1°CWB) 25 ft. (7.6 m) 0 ft (0 m) * Due to continuing improvement, above specification may be subject to change without notice. 4 *3 Connect the joint (purchased locally) for R22 Unit converter kcal/h Btu/h cfm lb = kW × 860 = kW × 3,412 = m3/min × 35.31 = kg/0.4536 *Above specification data is subject to rounding variation. 2-2. Electrical parts specifications Service Ref. PKFY-P12NHMU-E Symbol PKFY-P15NHMU-E PKFY-P18NHMU-E Parts name Room temperature thermistor TH21 Resistance 30°F/15.8k, 50°F/9.6k, 70°F/6.0k, 80°F/4.8k, 90°F/3.9k, 100°F/3.2k Liquid pipe thermistor TH22 Resistance 30°F/15.8k, 50°F/9.6k, 70°F/6.0k, 80°F/4.8k, 90°F/3.9k, 100°F/3.2k Gas pipe thermistor TH23 TH24 Resistance 30°F/15.8k, 50°F/9.6k, 70°F/6.0k, 80°F/4.8k, 90°F/3.9k, 100°F/3.2k Fuse (Indoor controller board) FUSE 250V 3.15A Fan motor MF 8-Pole Output 30W / RCOJ30-CK Vane motor (with limit switch) MV MSFBC20 DC12V Linear expansion valve LEV DC12V Stepping motor drive Port :3.2 (0~2000pulse) Power supply terminal block TB2 (L1, L2, GR) 250V 20A TB5 (M1, M2, S) 250V 20A TB15 (1, 2) 250V 10A Transmission terminal block MA remote controller terminal block 2-3. Sound levels Sound level at anechoic room : Low-Middle-High Sound level dB (A) 34-38-42 34-38-42 36-41-45 3.3 ft. (1m) Service Ref. PKFY-P12NHMU-E PKFY-P15NHMU-E PKFY-P18NHMU-E 3.3 ft. (1m) Measurement location * Measured in anechoic room. 2-4. NC curves PKFY-P18NHMU-E External static pressure : 0Pa Power source : 208,230V, 60Hz 70.0 High speed Low speed 65.0 60.0 NC60 55.0 50.0 NC50 45.0 40.0 NC40 35.0 30.0 NC30 25.0 20.0 Approximate minimum audible limit on continuous noise NC20 15.0 10.0 63 125 250 500 1k 2k 4k OCTAVE BAND CENTER FREQUENCIES(Hz) 8k OCTAVE BAND PRESSURE LEVEL (dB) 0dB = 20MPa OCTAVE BAND PRESSURE LEVEL (dB) 0dB = 20MPa PKFY-P12, 15NHMU-E External static pressure : 0Pa Power source : 208,230V, 60Hz 70.0 High speed Low speed 65.0 60.0 NC60 55.0 50.0 NC50 45.0 40.0 NC40 35.0 30.0 NC30 25.0 20.0 Approximate minimum audible limit on continuous noise NC20 15.0 10.0 63 125 250 500 1k 2k 4k OCTAVE BAND CENTER FREQUENCIES(Hz) 5 8k OUTLINES AND DIMENSIONS 15-3/16(387) 7-1/2(192) Unit : inch (mm) Top side 7-3/4(197) PKFY-P12, 15, 18NHMU-E Mount board 23-9/16(599) Front side 11-5/8(295) Right side D Left side A 27-1/16(688) 2-1/8 (55) Knockout hole for left piping 9-13/16(249) 6-1/16(155) 35-3/8(898) :2-1/2~:3-1/8 (:65~:80) 3/16(5) Knockout hole for right piping Front side(Grille open) Sleeve (purchased locally) Through hole :2-1/2~:3-1/8 (:65~:80) Terminal block for power supply Terminal block for transmission Terminal block for MA-remote controller 17-15/16(457)Gas pipe 21-3/16(539)Liquid pipe 24(610)Drain hose 6-5/8(169) 6-3/16(158) DEFROST/STAND BY lamp Operation lamp 24-1/16(612) 5/16(8) Emergency operation switch (cooling/heating) 7-3/16(184) Under side Vane(auto) Refrigerart Piping Liquid pipe 1/4F (:6.35) Gas pipe 1/2F (:12.7) Drain hose Knockout hole for lower piping Knockout hole for lower piping Louver(manual) C :5/8 (:16) I.D Receiver B 5/32(3.8) 12-7/8(237.5) 14(356.3) 14-5/8(372.3) 7-13/16(200) 8-13/16(225) 9-5/16(238) 10-3/8(265) 11-7/16(291.5) Mount board 4-7/8(125) 0 5/8(16) 1-1/16(28.5) 1-9/16(41) 3-1/16(78.5) 3-9/16(91) 4-1/16(103.5) 4-9/16(116) 6-1/2(166) 7(178.5) 8(203.5) 9-1/8(232.5) 9-15/16(253.5) 2-3/4(70) 0 2-3/4(70) 9/16(15) 0 9/16(15) 4-7/8(125) 8-13/16(225) 7-13/16(200) 11-7/16(291.5) 10-3/8(265) 14-5/8(372.3) 14(356.3) 12-7/8(327.5) 77-:3/16(:5.1) Tapping screw hole 2-1/4(58) Center measurement hole :3/32(:2.5) 4-:5/16(:9) Bolt hole Indoor unit outline 13/16(21.8) 0 3/4(20) 1-1/4(32.7) 2-1/16(53.5) 2-9/16(66) 5(128.5) 6(153.5) 11-1/16(281) Min.1-31/32(50) 2-3/16(56) 1-11/16(43) 1-3/4(46) 2-5/16(60) Air outlet Min.1-31/32(50) Min.8-5/8 (220) B 6 Min.5-7/8(150) Min.9-13/16(250) 1-11/16(43) Min.1/4(7) 2-11/16(69) 3/16(6) A 1-11/16(43) Air inlet D 3/16(6) 1-11/16(43) C Wall hole for right rear piping Air inlet 1-3/4(46) 2-3/16(56) 2-3/16(56) 10-3/4(273.2) Required space(Indoor unit) Knockout hole for piping 7/16(12.5) 7-9/16(193.5) Knockout hole for rear piping 2-3/4×12-3/16(70×310) 4-1/2(115) 5-1/2(140) 6-9/16(167) 7-1/16(180.3) 10-15/16(278.3) 9-5/16(238) 8-3/8(213) 6-13/16(174) 15-1/2(394) Wall hole for left rear piping 17-5/8(449) 0 17-5/8(449) 9-1/16(231.5) 2-5/16(59) 3 4 WIRING DIAGRAM PKFY-P12, 15, 18NHMU-E SYMBOL I.B CN24 CN32 CN51 CN52 BZ DSA FUSE LED1 LED2 SW2 SW3 SW4 SWE X1 MOV 01.02 LEV MF MV TB2 TB5 TB15 PIPE TEMP. DETECTION / GAS1 (32°F/15k,77°F/5.4kΩ) TH24 PIPE TEMP. DETECTION / GAS2 (32°F/15k,77°F/5.4kΩ) ADDRESS BOARD FAN SPEED SELECTOR SWITCH MODE SELECTION ADDRESS SETTING 1s DIGIT ADDRESS SETTING 10ths DIGIT BRANCH No. SWITCH BOARD EMERGENCY OPERATION(HEAT) EMERGENCY OPERATION(COOL) PCB FOR WIRELESS REMOTE CONTROLLER LED(OPERATION INDICATOR:GREEN) LED(OPERATION FOR HEATING :ORANGE ) RECEIVING UNIT 3 TO NEXT INDOOR UNIT MF 6 LEV M M LD SWE(B) LED2 RED BLU BLK MV FUSE CNP 3 (BLU) 6 1 DSA MOV1 X1 3 MOV2 U U 5 VANE 1 CN151 (WHT) LED1 1 LDSWE(A) (BLU) 5 BRN RED BLU ORN YLW WHT 5 GRN YLW ORN RED BRN BLK WHT YLW BLU 1 6 CNRU (WHT) 6 1 FLOAT SW CN4F (WHT) 4 BZ SWE OFF ON 8 ADDRESS CN81 (RED) 1 1 TH24 Models t ○ TH23 CN32 (WHT) 3 S.B LED1 1 GAS2 CN2G (BLK) 2 1 DC311~339V RECTIFICATION W.B CN52 (GRN) 5 CN51 1 (WHT) CN24 (YLW) 2 1 1 LEV CN60 (YLW) 1 SWE1 SWE2 RU I.B CND (BLK) LD101(B) t SW2 P12 ON OFF P15 ON OFF P18 ON OFF ○ LIQUID/GAS1 CN44 (WHT) ADDRESS 4 1 CN42 4 (RED) 1 INTAKE CN20 (RED) 2 1 TH22 t ○ TH21 t ○ LED2 123456 123456 123456 4 TB15 1 9 10ths DIGIT 0 1 ADDRESS CN82 (RED) SW14 E 1s DIGIT F0 1 2 3456 TO OUTDOOR UNIT BC CONTROLLER REMOTE CONTROLLER DC24-30V 0 1 2 3 M1 M2 S (SHIELD) TB5 9 2 3 2 TO MA-REMOTE CONTROLLER DC8.7-13V SW1 3 2 1 1 2 3 4 5 6 7 8 9 10 SWA SW12 SW11 BCD ON OFF 7 8 See fig:1 ADDRESS CN43 (RED) 3 7 8 ORN 1 ORN BLU BLU 12345678 8 5 6 1234 MA-REMOCON CN3A (BLU) 4 SW3 5 6 SW4 4 M-NET SW2 CN2M(BLU) ON OFF 1 2 123456 789A RED TH23 FUSE BREAKER PULL (16A) (16A) BOX GR 3 FAN CNMF (WHT) PIPE TEMP. DETECTION / LIQUID (32°F/15k,77°F/5.4kΩ) POWER SUPPLY 208/230V 60Hz <+2> 1 TH22 A.B SWA SW1 SW11 SW12 SW14 S.B SWE1 SWE2 W.B LED1 LED2 RU VANE MOTOR TERMINAL POWER SUPPLY TRANSMISSION BLOCK MA-REMOTE CONTROLLER TB2 RED L1 BLU L2 GRN/YLW MS 3~ NAME SYMBOL TH21 THERMISTOR ROOM TEMP. DETECTION (32°F/15k,77°F/5.4kΩ) NAME INDOOR CONTROLLER BOARD CONNECTOR EXTERNAL HEATER REMOTE SWITCH CENTRALLY CONTROL REMOTE INDICATION BUZZER SURGE ABSORBER FUSE (T3.15AL 250V) POWER SUPPLY (I.B) POWER SUPPLY (I.B) SWITCH CAPACITY CODE MODE SELECTION MODEL SELECTOR DRAIN PUMP (TEST MODE) AUX.RELAY DRAIN PUMP (OPTION) VARISTOR LINEAR EXPANSION VALVE FAN MOTOR BRANCH No. A.B LED on indoor board for service Mark Meaning LED1 Main power supply LED2 Power supply for MA-Remote controller Function Main power supply (Indoor unit:208-230V) Power on → Iamp is lit Power supply for MA-Remote controller on → Iamp is lit NOTES: 1.At servicing for outdoor unit,always follow the wiring diagram of outdoor unit. 2.In case of using MA-Remote controller, please connect to TB15. (Remote controller wire is non-polar.) 3.In case of using M-NET, please connect to TB5. (Transmission line is non-polar.) 4.Symbol [S] of TB5 is the shield wire connection. 5.Symbols used in wiring diagram above are, : terminal block, :connecter. 6.The setting of the SW2 dip switches differs in the capacity. for the detail, refer to the fig:1. <+2>Use copper supply wires. 7 5 REFRIGERANT SYSTEM DIAGRAM PKFY-P12, 15, 18NHMU-E Gas pipe thermistor TH23 Strainer (#50mesh) Gas pipe Gas pipe thermistor TH24 Liquid pipe thermistor TH22 Heat exchanger Liquid pipe Room temparature thermistor TH21 Linear expansion valve Strainer1 (#50mesh) Strainer2 (#100mesh) Strainer (#100mesh) Unit : mm (inch) Service Ref. Item PKFY-P12,15,18NHMU-E Gas pipe :12.7(1/2) Liquid pipe :6.35(1/4) 8 Flare connection 6 MICROPROCESSOR CONTROL INDOOR UNIT CONTROL 6-1. COOL OPERATION Press POWER ON/OFF button. Press the operation MODE button to display COOL. Press the TEMP. button to set the desired temperature. NOTE: The set temperature changes 2°F when the or pressed one time. Cooling 67 to 87°F TIME SUN MON TUE WED THU FRI SAT TIMER Hr ON AFTER AFTER OFF ERROR CODE FUNCTION FILTER ûFûC ûFûC WEEKLY SIMPLE AUTO OFF ONLY1Hr. TEMP. MENU BACK PAR-21MAA MONITOR/SET ON/OFF ON/OFF FILTER DAY CLOCK Control modes 1. Thermoregulating function button is CHECK TEST OPERATION CLEAR Control details 1-1. Thermoregulating function (Function to prevent restarting for 3 minutes) • Room temperature desired temperature + 2°F ···Thermo ON • Room temperature desired temperature ···Thermo OFF Remarks 1-2. Anti-freezing control Detected condition : When the liquid pipe temp. (TH22) is 32°F or less in 16 minutes from compressors start up, anti-freezing control starts and the thermo OFF. Released condition : The timer which prevents reactivating is set for 3 minutes, and anti-freezing control is cancelled when any one of the following conditions is satisfied. Liquid pipe temp. (TH22) turns 50°F or above. The condition of the thermo OFF has become complete by thermoregulating, etc. The operation modes became mode other than COOL. The operation stopped. 2. Fan By the remote controller setting (switch of 3 speeds+Auto) Type Fan speed notch 3 speeds + Auto type [Low], [Mid], [High], [Auto] When [Auto] is set, fan speed is changed depending on the value of: Room temperature - Desired temperature (up/down vane change) (1) Initial setting: Start at COOL mode and horizontal vane. (2) Vane position: Horizontal →Downward A →Downward B →Downward C→Downward D→Swing→Auto → 3. Vane (3) Restriction of the downward vane setting When setting the downward vane A, B, C or D in [Mid], [Low] or [Auto] of the fan speed notch, the vane changes to horizontal position after 1 hour have passed. 9 · "ONLY 1 Hr" appears on the wired remote controller. 6-2. DRY OPERATION TIME SUN MON TUE WED THU FRI SAT TIMER Hr ON AFTER AFTER OFF ERROR CODE FUNCTION FILTER ûFûC ûFûC WEEKLY SIMPLE AUTO OFF ONLY1Hr. TEMP. MENU BACK PAR-21MAA MONITOR/SET ON/OFF ON/OFF CHECK TEST OPERATION CLEAR Control modes Remarks Control details 1. Thermo regulating 1-1. Thermo regulating function (Function to prevent restarting for 3 minutes) Setting the Dry thermo by the thermo regulating signal and the room function temperature (TH21). Dry thermo ON Room temperature desired temperature + 2°F Dry thermo OFF Room temperature desired temperature Room temperature Dry thermo Dry thermo ON OFF Thermo regulating signal Room temperature (T1) time (min) time (min) 3 min. passed since starting operation ON Over 64°F T1 83°F 9 3 83°F > T1 79°F 7 3 79°F > T1 75°F 5 3 3 3 3 10 75°F > T1 OFF Unconditional Dry thermo OFF Less than 64°F 1-2. Freeze prevention control No control function 2. Fan button is FILTER DAY CLOCK Press POWER ON/OFF button. Press the operation MODE button to display DRY. Press the TEMP. button to set the desired temperature. NOTE: The set temperature changes 2°F when the or pressed one time. Dry 67 to 87°F Indoor fan operation controlled depending on the compressor conditions. Dry thermo Fan speed notch ON [Low] OFF Excluding the following Stop Room temp. < 64°F [Low] Note: Remote controller setting is not acceptable. Same control as COOL operation 3. Vane (up/down vane change) 10 6-3. FAN OPERATION Press POWER ON/OFF button. Press the operation MODE button to display FAN. TIME SUN MON TUE WED THU FRI SAT TIMER Hr ON AFTER AFTER OFF ERROR CODE ûFûC ûFûC WEEKLY SIMPLE AUTO OFF ONLY1Hr. TEMP. MENU BACK PAR-21MAA MONITOR/SET FUNCTION FILTER ON/OFF ON/OFF FILTER DAY CLOCK CHECK TEST OPERATION CLEAR Control modes 1. Fan Control details Remarks Set by remote controller. Type Fan speed notch 3 speeds + Auto type [Low], [Mid], [High], [Auto] When [Auto] is set, fan speed becomes [Low]. 2. Vane Same as the control performed during the COOL operation, but with no restriction (up/down vane change) on the vane's downward blow setting 11 · Same control as COOL operation 6-4. HEAT OPERATION Press POWER ON/OFF button. Press the operation MODE button to display HEAT. Press the TEMP. button to set the desired temperature. NOTE: The set temperature changes 2°F when the or pressed one time. Heating 63 to 83°F. TIME SUN MON TUE WED THU FRI SAT TIMER Hr ON AFTER AFTER OFF ERROR CODE ûFûC ûFûC WEEKLY SIMPLE AUTO OFF ONLY1Hr. TEMP. MENU BACK PAR-21MAA MONITOR/SET FUNCTION FILTER ON/OFF ON/OFF [DEFROST] The [DEFROST] symbol is only displayed during the defrost operation. [STANDBY] The [STANDBY] symbol is only displayed during the hot adjust mode. FILTER DAY CLOCK CHECK TEST OPERATION CLEAR Control modes 1. Thermoregulating function 2. Fan button is Remarks Control details 1-1. Thermoregulating function (Function to prevent restarting for 3 minutes) • Room temperature desired temperature -2°F ···Thermo ON • Room temperature desired temperature ···Thermo OFF By the remote controller setting (switch of 3 speeds+Auto) Type Fan speed notch 3 speeds + Auto type [Low], [Mid], [High], [Auto] When [Auto] is set, fan speed is changed depending on the value of: Desired temperature - Room temperature Give priority to under-mentioned controlled mode 2-1. Hot adjust mode 2-2. Residual heat exclusion mode 2-3. Thermo OFF mode (When the compressor off by the thermoregulating) 2-4. Cool air prevention mode (Defrosting mode) 2-1. Hot adjust mode The fan controller becomes the hot adjuster mode for the following conditions. When starting the HEAT operation When the thermoregulating function changes from OFF to ON. When release the HEAT defrosting operation Hot adjust mode *1 *1 "STAND BY" will be displayed during the hot adjust mode. Set fan speed by the remote controller [Low] [Extra Low] A B C A: Hot adjust mode starts. B: 5 minutes have passed since the condition A or the indoor liquid pipe temperature turned 95°F or more. C: 2 minutes have passed since the condition B. (Terminating the hot adjust mode) 2-2. Residual heat exclusion mode When the condition changes the auxiliary heater ON to OFF (thermoregulating or operation stop, etc), the indoor fan operates in [Low] mode for 1 minute. · This control is same for the model without auxiliary heater. To be continued on the next page. 12 From the preceding page Control details Control modes Remarks 2-3. Thermo OFF mode When the thermoregulating function changes to OFF, the indoor fan operates in [Extra low]. 2. Fan 2-4. Heat defrosting mode The indoor fan stops. (1) Initial setting: OFF → HEAT···[last setting] When the last setting is [Swing] ··· [Downward D] When changing the mode from exception of HEAT to HEAT operation ···[Downward D] (2) Vane position: 3. Vane control (Up/down vane change) → Horizontal →Downward A →Downward B →Downward C→Downward D→Swing→Auto (3) Restriction of vane position The vane is horizontally fixed for the following modes. (The control by the remote controller is temporally invalidated and control by the unit.) •Thermo OFF •Hot adjust [Extra low] mode •Heat defrost mode 6-5. AUTO OPERATION [AUTOMATIC COOL/HEAT CHANGE OVER OPERATION] TIME SUN MON TUE WED THU FRI SAT TIMER Hr ON AFTER AFTER OFF ERROR CODE ûFûC ûFûC WEEKLY SIMPLE AUTO OFF ONLY1Hr. TEMP. MENU BACK PAR-21MAA MONITOR/SET FUNCTION FILTER ON/OFF ON/OFF button is FILTER DAY CLOCK Press POWER ON/OFF button. Press the operation MODE button to display AUTO. Press the TEMP. button to set the desired temperature. NOTE: The set temperature changes 2°F when the or pressed one time. Automatic 67 to 83°F CHECK TEST OPERATION CLEAR Control details Control modes 1. Initial value of HEAT mode for room temperature < Desired temperature operation mode COOL mode for room temperature Desired temperature 2. Mode change (1) HEAT mode → COOL mode Room temperature Desired temperature + 3°F. or 3 min. has passed (2) COOL mode → HEAT mode Room temperature Desired temperature - 3°F. or 3 min. has passed 3. COOL mode Same control as cool operation 4. HEAT mode Same control as heat operation 13 Remarks 7 TROUBLESHOOTING 7-1. HOW TO CHECK THE PARTS PKFY-P12, 15, 18NHMU-E Parts name Check points Disconnect the connector then measure the resistance with a tester. (At the ambient temperature 50°F~86°F) Room temperature thermistor (TH21) Liquid pipe temperature thermistor (TH22) Gas pipe temperature thermistor (TH23 ,24) Vane motor (MV) Red Normal Abnormal Open or short Orange Green 350 ± 7%  Refer to 7-1-3. Linear expansion valve (LEV) CN60 White Yellow Orange Blue Red Brown Refer to the next page for the details. - - - - Brown-Red Brown-Orange Brown-Yellow Brown-Green M Fan motor (MF) LEV Abnormal Open or short Measure the resistance between the terminals with a tester. (Coil temperature 77°F) Yellow Brown Connect pin No. Normal 4.3k~9.6k Disconnect the connector then measure the resistance value with a tester. (Coil temperature 68°F) 1 2 3 4 5 6 Normal Abnormal (1)-(5) (2)-(6) (3)-(5) (4)-(6) White-Red Yellow-Brown Orange-Red Blue-Brown Open or short 200 ± 10% 7-1-1. Thermistor < Thermistor for lower temperature > 50 Room temperature thermistor (TH21) Liquid pipe temperature thermistor (TH22) Gas pipe temperature thermistor (TH23) (TH24) Thermistor for lower temperature Rt=15exp { 3480( 30°F 50°F 70°F 80°F 90°F 100°F 15.8kΩ 9.6kΩ 6.0kΩ 4.8kΩ 3.9kΩ 3.2kΩ 1 273+(t-32)/1.8 Resistance (kΩ) Thermistor R0=15kΩ ± 3% Fixed number of B=3480 ± 2% 40 1 )} 273 30 20 10 0 -20 0 20 40 60 80 Temperature (°F) 100 120 7-1-2. Liner expansion valve Operation summary of the linear expansion valve • Linear expansion valve open/close through stepping motor after receiving the pulse signal from the indoor controller board. • Valve position can be changed in proportion to the number of pulse signals. Controller board DC12V Brown 6 Red 5 Blue 4 Φ4 Φ3 Orange 3 Φ3 Φ2 Yellow 2 Φ2 Φ1 White 1 Φ1 Linear expansion valve 4 M 1 White Red 5 6 2 3 Orange Blue Brown Yellow Φ4 Connector(CN60) 14 Drive circuit Output Output (Phase) 1 ON ON OFF OFF [1 [2 [3 [4 2 OFF ON ON OFF 3 OFF OFF ON ON 4 ON OFF OFF ON Linear expansion valve operation Note: • When linear expansion valve operation stops, all output phase become OFF. • At phase interruption or when phase does not shift in order, motor does not rotate smoothly and motor will lock and vibrate. • When the switch is turned on, 2200 pulse closing valve signal will be sent till it goes to point in order to define the valve position. Open C D Valve position (capacity) Closing a valve : 1 → 2 → 3 → 4 → 1 Opening a valve : 4 → 3 → 2 → 1 → 4 The output pulse shifts in above order. • When the valve moves smoothly, there is no sound or vibration occurring from the linear expansion valves, however, when the pulse number moves from to or when the valve is locked, more sound can be heard than in a normal situation. • Sound can be detected by placing the ear against the screw driver handle while putting the screw driver tip to the linear expansion valve. Close Open Outdoor unit R410A model : 1400 pulse Outdoor unit R22 model : 2000 pulse Opening a valve all the way A E Close B Pulse number Extra tightening (200~800 pulse) Trouble shooting Check points Symptom Countermeasures Operation circuit failure of the micro processor Disconnect the connector on the controller board, then con- Exchange the indoor connect LED for checking. troller board at drive circuit 6 5 failure. 4 3 2 1 1kΩ LED When power is turned on, pulse signals will be output for 10 seconds. There must be some defects in the operation circuit if the LED does not light while the signals are output or keeps lighting even after the signals stop. Linear expansion valve mechanism is locked. Motor will idle and make a ticking noise when the motor is operated while the linear expansion valve is locked. This ticking sound is the sign of the abnormality. Exchange the linear expansion valve. Short or breakage Measure the resistance between each coil (white-red, yellow- Exchange the linear expanof the motor coil of brown, orange-red, blue-brown) using a tester. It is normal if sion valve. the linear expansion the resistance is in the range of 200Ω ±10%. valve Valve does not close To check the linear expansion valve, operate the indoor unit If large amount of refrigercompletely. in fan mode and at the same time operate other indoor units ant is leaked, exchange the linear expansion valve. in cooling mode, then check the pipe temperature of the indoor unit by the outdoor multi controller board operation monitor. During fan operation, linear expansion valve is closed completely and if there Thermistor (Liquid pipe) is any leaking, detecting temperature of the thermistor will go lower. If the detected Linear temperature is much lower than the temexpansion valve perature indicated in the remote controller, it means the valve is not closed all the way. It is not necessary to exchange the linear expansion valve, if the leakage is small and not affecting normal operation. Wrong connection of the connector or contact failure Check the color of lead wire and missing terminal of the con- Disconnect the connector nector. at the controller board, then check the continuity. 15 7-1-3. DC Fan motor (fan motor/indoor controller circuit board) Check method of DC fan motor (fan motor/indoor controller circuit board) Notes · High voltage is applied to the connecter (CNMF) for the fan motor. Pay attention to the service. · Do not pull out the connector (CNMF) for the motor with the power supply on. (It causes trouble of the indoor controller circuit board and fan motor.) Self check Symptom : The indoor fan cannot turn around. Wiring contact check Contact of fan motor connector (CNMF) Is there contact failure? Wiring recovery Yes No Power supply check (Remove the connector (CNMF)) Measure the voltage in the indoor controller circuit board. TEST POINT : VDC (between 1 (+) and 3 (-) of the fan connector): VDC DC294~325V TEST POINT : VCC (between 4 (+) and 3 (-) of the fan connector): VCC DC15V Is the voltage normal? Indoor controller board fuse check No No Is the fuse normal? Replace the fuse Yes OK Check the operation Yes Sensor signal check Measure the voltage between CNMF and DC 0V and DC 15V in the indoor controller circuit board. No Does the voltage repeat DC 0V and DC 15V? NG Replace indoor controller board. OK Check the operation END NG Replace the fan motor Yes Replace indoor controller board Replace the fan motor OK OK Check the operation END Check the operation NG NG Replace the fan motor. Replace indoor controller board. 16 END END 7-2. Function of Dip switch PKFY-P12, 15, 18NHMU-E Switch Pole Operation by switch Function ON OFF 1 Thermistor position Built-in remote controller Indoor unit 2 Filter clogging detection Provide Not provide 3 Filter cleaning sign 4 Fresh air intake SW1 5 Mode selection 6 7 2,500 hr 100 hr Not effective Not effective 1 2 3 4 5 6 7 8 9 10 +2 Switching remote controller display Thermo ON signal indication Fan output indication Fan operation at Heating mode Thermo ON operation at heating mode Humidifier control 8 9 Auto restart function Effective Not effective Power ON/OFF by breaker Effective Not effective Models SW2 Capacity 1~6 code switch P12 P15 P18 NOTE: +1 Under suspension +2 It is impossible to intake the fresh air. Indoor controller board SW2 ON OFF ON OFF ON OFF Before power supply ON 123456 123456 123456 Heat pump/Cool only 2 Not used — — 3 Not used — — Cooling only Heat pump Vane horizontal angle Second setting +1 First setting Changing the opening of linear expansion valve during thermo OFF Effective Not effective Heating 4 degree up Not effective Effective 7 Target superheat setting +2 — — 8 Target subcool — — +2 SW1-7 SW1-8 Fan speed OFF OFF Extra low ON OFF Low OFF ON Setting air flow ON ON Stop Depends on SW1-7 1 In case of replacing the indoor controller board, make sure to set the switch to the initial setting, which is shown below. SW4 Model 1~4 selection ON OFF Extra low +1 SW3 4 Function selection 5 6 Remarks Address board Air flow set in case of heat Low +1 thermo OFF Setting air flow +1 10 Effective timing ON OFF 1 2 3 4 17 Indoor controller board Under suspension ON OFF 1 2 3 4 5 6 7 8 +1 Second setting is same as first setting. +2 Please do not use SW3-7,8 as trouble might be caused by the usage condition. Indoor controller board Before power supply ON 1 CDE AB 789 Address board SW14 CDE AB F01 789 Rotary switch Before power supply ON 23 Jumper 90 1 • To operate each indoor unit by each remote controller when installed 2 indoor units or more are near, Pair No. setting is necessary. Pair No. setting is available with the 4 patterns (Setting patterns A to D). . Make setting for J41, J42 of indoor controller board and the Pair No. of wireless remote controller. • You may not set it when operating it by one remote controller. Setting for indoor unit Cut jumper wire J41, J42 on the indoor controller board according to the table below. Wireless remote controller pair number: Setting operation Under 1. Press the SET button (using a pointed implement). Check that the operation remote controller's display has stopped before continuing. or MODEL SELECT flashes, and the model No. (3 digits) appears (steadily-lit). 2. Press the MINUTE button twice. The pair number appears flashing. suspension 3. Press the temperature buttons to select the pair number to set. 4. Press the SET button (using a pointed implement). The set pair number is displayed (steadily-lit) for 3 seconds, then disappears. Setting pattern Indoor controller jumper wire Pair No. of wireless remote controller J41 J42 0 — — A Initial setting 1 — — Cut B 2 — Cut — C 3 — Cut Cut D Pair No.4-9 of wireless remote controller is setting pattern D. 18 45 6 Wireless remote controller Pair No. How to set branch numbers SW14 (Series R2 only) Match the indoor unit’s refrigerant pipe with the BC controller’s end connection number. Remain other than series R2 at "0". SW11 90 1 23 J41, J42 45 6 SW14 Branch No. Setting 23 F01 SW12 23 SW14 78 45 6 45 6 10 Address board How to set addresses Example : If address is "3", remain SW12 (for over 10) at "0", and match SW11 (for 1 to 9) with "3". 78 78 78 23 Rotary Switch 90 1 45 6 SW11 90 1 Remarks 45 6 SW12 23 SW11 1s digit address setting SW12 10ths digit address setting Effective timing Operation by switch Switch Pattern A Pair No. MODEL SELECT FAN AUTO STOP VANE AUTO START CHECK LOUVER SET h min TEST RUN SET button Temperature button TEMP ON/OFF MODE Model No. RESET CLOCK Minute button 7-3. TEST POINT DIAGRAM 7-3-1. Indoor controller board PKFY-P12NHMU-E PKFY-P15NHMU-E PKFY-P18NHMU-E CNMF Connect to the fan motor (MF) 1-3 : DC294~325V 4-3 : DC15V 5-3 : DC0~6V 6-3 : DC0 or DC15V (Stop) DC7.5V (Operation) (12VDC pluse) FUSE 3.15A 250V CND Power supply for indoor controller board 1-3 : 208/230VAC LED1 Main power supply (Indoor unit : 208/230VAC) CN2M Connect to the terminal block (TB5) (M-NET transmission connecting wire) 24-30VDC (non-polar) Power supply from outdoor unit CN151 Vane motor output 12VDC pluse CNRU Connect to the wireless remote controller board (W.B) SW2 Capacity setting LDSWE(A) Connect to the wireless remote controller board (S.B) SW4 Model selection SW3 Function setting CN52 Remote indicator Jumper wire J41, J42 Pair No. setting for wireless remote controller LED2 Power supply for MA-Remote controller CN3A Connected to the termial block (TB15) (MA-Remote controller connecting wire) 1 - 3 : 8.7-13V DC (Pin1 (+)) CN32 Remote switch CN2G Pipe temperature thermistor Gas2 (TH24) CN20 Room temperature thermistor (TH21) CN44 Pipe temperature thermistor 1-2 : Liquid (TH22) 3-4 : Gas1 (TH23) 19 CN60 Liner expansion valve (LEV) output 12VDC pluse output CN24 External heater CN51 Centrally controlled LD SWE (B) Connect to the indoor controller board (I.B) 7-3-2. Wireless remote controller board PKFY-P12NHMU-E PKFY-P15NHMU-E PKFY-P18NHMU-E LD101 Connect to the indoor controller board (I.B) 7-3-3. Address board PKFY-P12NHMU-E PKFY-P15NHMU-E PKFY-P18NHMU-E SW1 Function setting 1 2 3 4 5 6 7 8 9 10 BCD 78 4 56 78 789A 4 56 SW12 SW11 Address setting 10ths DIGIT Address setting 1s DIGIT 3456 EF0 12 90 1 23 23 90 1 SW14 Branch No. 20 8 DISASSEMBLY PROCEDURE PKFY-P12NHMU-E PKFY-P15NHMU-E PKFY-P18NHMU-E Be careful when removing heavy parts. OPERATION PROCEDURE PHOTOS & ILLUSTRATIONS 1. REMOVING THE LOWER SIDE OF THE INDOOR UNIT FROM THE INSTALLATION PLATE Figure 1 (1) Remove the front panel. (2) Insert the screw driver to the corner hole at both left and right side as shown in the figure 1. (3) Push it up, then pull down the lower side of indoor unit and remove the hook. Push Corner hole Be careful not to damage the airflow adjustment plate with the screw driver. Push Down 2. REMOVING THE FRONT PANEL Photo 1 (1) Press and unlock the knobs on both sides of the front panel and lift the front panel until it is level. Pull the hinges forward to remove the front panel. (See Photo 2) (2) Move the horizontal vanes in a downward direction. (3) Remove the screw caps of the panel. Remove the screws. (See Photo 1) (4) Hold the lower part of both ends of the panel and pull it slightly toward you, and then remove the panel by pushing it upward. Vane Front panel Screw caps Photo 2 21 OPERATION PROCEDURE PHOTOS Photo 3 3. REMOVING THE INDOOR CONTROLLER BOARD AND WIRELESS CONTROLLER BOARD Screw (top cover) (1) Remove the front panel. (Refer to 2.) (2) Remove the room temp. thermistor TH1. (see Photo 3) (3) Remove the electrical box covers (screw 4 × 12). (See Photo 3) (4) Disconnect the connectors on the indoor controller board. (5) Remove the switch board cover. (6) Pull out the indoor controller board toward you, then disconnect the rest of connectors. Remove the indoor controller board and switch board. (7) Remove the holder of wireless controller board. (8) Disconnect the connector of wireless controller board and remove the wireless controller board from the holder. Photo 5 Room temp. thermistor (TH21) Screw (side cover) Nozzle assembly Switch board cover Holder of wireless controller board Photo 4 Screw of electrical box side cover & clamp Indoor controller board (I.B) Terminal block (TB2) Room temp. thermistor (TH21) (45) Electrical box cover (top) Electrical box Screw (side cover) cover (side) Terminal block (TB5) Terminal block (TB15) Electrical box side cover Clamp Caution: In the case that room temp. thermistor is fixed with the screw of electrical box side cover, keep 45mm (1-3/4 inch) between the bottom end of clamp and the top of room temp. thermistor as Photo 5. Fixture (right) Room temp. thermistor (TH21) 4. REMOVING THE ELECTRICAL BOX Fixture (right) Photo 6 (1) Remove the front panel. (Refer to 2.) (2) Remove the electrical box covers. (See Photo 3) (3) Remove the nozzle assembly. (Refer to 5.) (4) Disconnect the transmission wiring of TB5. (5) Disconnect the power supply wiring of TB2. (6) Disconnect the wiring of MA-remote controller (TB15). (7) Disconnect the connectors on the indoor controller board. (8) Disconnect the connector for the ground wire. (See Photo 6) (9) Pull the disconnected lead wire out from the electrical box. (10) Remove the screw of electrical box. (See Photo 7) (11) Push up the upper fixture (See Photo 6) catch to remove the box, then pull the right fixture (See Photo 4) and remove it from the box fixture. Connector for ground wire Photo 7 Screw (Electrical box) 22 Fixture (upper) OPERATION PROCEDURE PHOTOS 5. REMOVING THE NOZZLE ASSEMBLY (with VANE and VANE MOTOR) AND DRAIN HOSE Electrical box cover (side) Electrical box cover (top) Screw (side cover) Screw (top cover) Photo 8 (1) Remove the front panel (Refer to 2.). (2) Remove the electrical box cover. (3) Disconnect the vane motor connector (CN151) on the indoor controller board. (4) Remove the corner box. (5) Pull the nozzle assembly and detach. (6) Push the fixture and remove the drain hose. Switch board cover Holder of wireless Nozzle assembly controller board 6. REMOVING THE INDOOR FAN MOTOR AND THE LINE FLOW FAN (1) Remove the front panel (Refer to 2.) and the corner box at right lower side. (2) Remove the electrical box (Refer to 4.) and the nozzle assembly (Refer to 5.). (3) Remove the screws fixing the motor bed. (See Photo 9) (4) Loosen the screw fixing the line flow fan. (See Photo 10) (5) Remove the motor bed together with fan motor and motor band. (6) Release the hooks of the motor band. Remove the motor band. Pull out the indoor fan motor. (7) Remove the screws fixing the left side of the heat exchanger. (See Photo 11) (8) Lift the heat exchanger, and pull out the line flow fan to the lower-left. Photo 11 Screw of the motor bed Photo 10 Screw of the line flow fan Photo 12 (1) Remove the nozzle assembly. (Refer to 5.) (2) Remove the screws of the vane motor unit, and pull out the vane motor unit. (3) Remove the screws of the vane motor unit cover. (4) Remove the vane motor from the vane motor unit. (5) Disconnect the connector from the vane motor. 8. REMOVING THE LIQUID PIPE THERMISTOR AND GAS PIPE THERMISTOR Remove the front panel. (Refer to 2) Remove the electrical box cover. Remove the motor band. Cut the wiring fixed band. Remove the liquid pipe thermistor and gas pipe thermistors. Disconnect the connector (CN44) (CN2G) on the indoor controller board. (TH22 and TH23/CN44, TH24/CN2G) 23 Fan motor Heat exchanger Screw of the left side of the heat exchanger 7. REMOVING THE VANE MOTOR (1) (2) (3) (4) (5) (6) Motor band Photo 9 Screw (side cover) Screws of the vane motor unit Screws of the vane motor unit cover Photo 13 Gas pipe thermistor (TH23) Liquid pipe thermistor (TH22) Gas pipe thermistor (TH24) OPERATION PROCEDURE 9. REMOVING THE HEAT EXCHANGER AND LEV (1) Remove the front panel (Refer to 2.) and the corner panel at right lower side. (2) Remove the electrical box (Refer to 4.) and the nozzle assembly (Refer to 5.). (3) Remove the motor band. (4) Remove the pipe thermistors (Refer to 8.). (5) Disconnect the connector (CN60) on the indoor controller board and the connector for ground wire. (See Photo 5) (6) Remove the screws fixing the left side of the heat exchanger. (See Photo 11) (7) Remove the heat exchanger with LEV. PHOTOS Photo 14 Water cover Electrical box cover (side) Electrical box cover (top) Screw (side cover) Screw (top cover) Screw (side cover) Switch board cover Holder of wireless Nozzle assembly controller board Ground wire Photo 15 LEV Heat exchanger 10. REMOVING THE ROOM TEMPERATURE THERMISTOR (1) (2) (3) (4) Remove the front panel (Refer to 2.). Remove the electrical box cover. Remove the room temperature thermistor. Disconnect the connector (CN20) on the indoor controller board. NOTE: When room temp. thermistor is replaced, be sure to use service parts No. R01 N20 202. Photo 17 Photo 16 Indoor controller board (I.B) Terminal block (TB2) Terminal block (TB5) Terminal block (TB15) Room temp. thermistor (TH21) Wire clip Fixture (right) Room temp. thermistor (TH21) Fixture (right) HEAD OFFICE : TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU TOKYO 100-8310, JAPAN Copyright 2009 MITSUBISHI ELECTRIC ENGINEERING CO., LTD. Distributed in Apr. 2009 No. OCH460 PDF 7 Made in Japan New publication, effective Apr. 2009 Specifications subject to change without notice